例子：下載apk然後安裝

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="com.wj.autocoffeem.fileProvider"
    android:exported="false"
    android:grantUriPermissions="true" >

    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/provider_paths" />
 

</provider>

//provider_paths

<?xml version="1.0" encoding="utf-8"?>
<resources>
<paths>
    <!--360-->
    <!--<root-path path="" name="camera_photos" />-->
    <!--與`${RNFS.ExternalStorageDirectoryPath}/NewApp.apk`這個路勁匹配的-->

    <files-path path="" name="camera_photos" />
    <!--與`${RNFS.DocumentDirectoryPath}/NewApp.apk`這個路勁匹配的-->
</paths>
</resources>

下載路勁：const downloadDestPath = `${RNFS.DocumentDirectoryPath}/NewApp.apk`;

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